IEC 60335-2-34:2012
(Main)Household and similar electrical appliances - Safety - Part 2-34: Particular requirements for motor-compressors
Household and similar electrical appliances - Safety - Part 2-34: Particular requirements for motor-compressors
IEC 60335-2-34:2012 deals with the safety of sealed (hermetic and semi-hermetic type) motor-compressors, their protection and control systems, if any, which are intended for use in equipment for household and similar purposes and which conform with the standards applicable to such equipment. It applies to motor-compressors tested separately, under the most severe conditions that may be expected to occur in normal use, their rated voltage being not more than 250 V for single-phase motor-compressors and 480 V for other motor-compressors. Examples of equipment which contain motor-compressors are:
- refrigerators, food freezers and ice makers (IEC 60335-2-24);
- air-conditioners, electric heat pumps and dehumidifiers (IEC 60335-2-40);
- commercial dispensing appliances and vending machines (IEC 60335-2-75);
- factory-built assemblies for transferring heat in applications for refrigerating, air-conditioning or heating purposes or a combination of such purposes.
This standard does not supersede the requirements of standards relevant to the particular appliance in which the motor-compressor is used. However, if the motor-compressor type used complies with this standard, the tests for the motor-compressor specified in the particular appliance standard may not need to be made in the particular appliance or assembly. If the motor-compressor control system is associated with the particular appliance control system, additional tests may be necessary on the final appliance. Keywords: Motor compressor, hermetic; semi-hermetic
This publication is to be read in conjunction with IEC 60335-1:2010.
Appareils électrodomestiques et analogues - Sécurité - Partie 2-34: Exigences particulières pour les motocompresseurs
La CEI 60335-2-34:2012 traite de la sécurité des motocompresseurs étanches (de type hermétique et hermétique accessible) et, le cas échéant, de leurs systèmes de protection et de commande, qui sont destinés à être utilisés sur les appareils électrodomestiques et analogues et qui sont conformes aux normes applicables à de tels matériels. Elle s'applique aux motocompresseurs soumis à essai séparément, dans les conditions les plus sévères qui peuvent se produire en usage normal, la tension assignée n'étant pas supérieure à 250 V pour les motocompresseurs monophasés et à 480 V pour les autres motocompresseurs. Comme exemples d'appareils équipés de motocompresseurs, on peut citer:
- les réfrigérateurs, congélateurs et fabriques de glace (CEI 60335-2-24);
- les climatiseurs, pompes à chaleur électriques et déshumidificateurs (CEI 60335-2-40);
- les distributeurs commerciaux avec ou sans moyen de paiement (CEI 60335-2-75),
- les ensembles montés en usine pour le transfert de chaleur dans des applications de réfrigération, de climatisation ou de chauffage, ou toute combinaison de ces fonctions.
La présente norme ne remplace pas les exigences des normes applicables aux appareils dans lesquels des motocompresseurs sont utilisés. Toutefois, si le type de motocompresseur utilisé est conforme à la présente norme, il est possible que les essais pour les motocompresseurs spécifiés dans les normes relatives aux appareils particuliers n'aient pas besoin d'être effectués sur l'appareil ou l'ensemble particulier. Si le dispositif de commande du motocompresseur est associé au dispositif de commande de l'appareil particulier, des essais complémentaires peuvent être nécessaires sur l'appareil final. Mots clé: motocompresseur, hermétique, hermétique accessible
Cette publication doit être lue conjointement avec la CEI 60335-1:2010.
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IEC 60335-2-34 ®
Edition 5.1 2015-05
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
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Household and similar electrical appliances – Safety –
Part 2-34: Particular requirements for motor-compressors
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IEC 60335-2-34 ®
Edition 5.1 2015-05
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-34: Particular requirements for motor-compressors
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 97.130.20 ISBN 978-2-8322-2671-1
IEC 60335-2-34 ®
Edition 5.1 2015-05
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Household and similar electrical appliances – Safety –
Part 2-34: Particular requirements for motor-compressors
– 2 – IEC 60335-2-34:2012
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CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 9
2 Normative references . 10
3 Terms and definitions . 10
4 General requirement . 11
5 General conditions for the tests . 12
6 Classification . 13
7 Marking and instructions . 14
8 Protection against access to live parts . 15
9 Starting of motor-operated appliances . 15
10 Power input and current . 15
11 Heating . 15
12 Void. 15
13 Leakage current and electric strength at operating temperature . 15
14 Transient overvoltages . 15
15 Moisture resistance . 15
16 Leakage current and electric strength . 15
17 Overload protection of transformers and associated circuits . 15
18 Endurance . 16
19 Abnormal operation . 16
20 Stability and mechanical hazards . 21
21 Mechanical strength . 21
22 Construction . 21
23 Internal wiring . 24
24 Components . 24
25 Supply connection and external flexible cords . 25
26 Terminals for external conductors . 25
27 Provision for earthing . 25
28 Screws and connections . 25
29 Clearances, creepage distances and solid insulation . 25
30 Resistance to heat and fire . 26
31 Resistance to rusting . 26
32 Radiation, toxicity and similar hazards . 26
Annexes . 28
Annex C (normative) Ageing test on motors . 28
Annex D (normative) Thermal motor protectors . 28
Annex AA (normative) Running overload tests for motor-compressors classified as
tested with Annex AA . 29
Annex BB (normative) Winding wire insulation compatibility tests . 38
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Annex CC (normative) Tie cords and insulation compatibility tests . 40
Annex DD (normative) Non-sparking “n” electrical apparatus . 42
Bibliography . 43
Figure 101 – Supply circuit for the locked-rotor test of a single-phase motor-
compressor . 27
Figure AA.1 – Substitute refrigeration circuit . 37
Table 101 – Minimum high side test pressures . 22
Table 102 – Minimum low side test pressures . 23
Table AA.1 – Substitute refrigeration circuit conditions for operating under running
overload conditions . 31
Table AA.2 – Substitute refrigeration circuit conditions for operating under maximum
and minimum load conditions . 34
Table BB.1 – Time temperature heating cycles . 39
Table CC.1 – Time temperature heating cycles . 41
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-34: Particular requirements for motor-compressors
FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendment has been prepared
for user convenience.
IEC 60335-2-34 edition 5.1 contains the fifth edition (2012-05) [documents 61C/508/FDIS and
61C/517/RVD] and its amendment 1 (2015-05) [documents 61C/597/FDIS and 61C/603/RVD].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendment 1. Additions and deletions are displayed in red, with
deletions being struck through. A separate Final version with all changes accepted is
available in this publication.
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This part of International Standard IEC 60335 has been prepared by subcommittee 61C:
Safety of refrigeration appliances for household and commercial use, of IEC technical
committee 61: Safety of household and similar electrical appliances.
The principal changes in this edition as compared with the fourth edition of IEC 60335-2-34
are as follows (minor changes are not listed):
– some notes have been deleted or converted to normative text (1, 6.103, 19.14, 22.7,
Figure 101);
– manufacturer must declare the type of motor protection used (5.102, 6.104);
– tests to fault-test motor-compressors incorporating electronic circuits introduced
(19.11.2, AA.5);
– application of the EMP tests clarified (19.11.4);
– testing of contactors and relays associated with motor-compressors introduced (19.14);
– tables 101 and 102 updated and corrected;
– running overload test conditions extended (AA.1, AA.2, AA.3, AA.4, AA.5).
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fifth edition (2010) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to
convert that publication into the IEC standard: Safety requirements for electrical motor-
compressors.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. When this standard states "addition", "modification" or "replacement",
the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in smaller roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
A list of all parts of the IEC 60335 series, under the general title Household and similar
electrical appliances – Safety, can be found on the IEC website.
– 6 – IEC 60335-2-34:2012
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The committee has decided that the contents of the base publication and its amendment will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
reconfirmed,
withdrawn,
replaced by a revised edition, or
amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 12 months or later than 36 months from the date of publication.
The following differences exist in the countries indicated below.
– 7.1: The locked-rotor current marking is required for some motor-compressors (USA).
– 22.7: Different test pressures are used (Japan, USA).
The contents of the corrigendum of June 2015 of Amendment 1 have been included in this
copy.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
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INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in
normal use taking into account the manufacturer's instructions It also covers abnormal
situations that can be expected in practice and takes into account the way in which
electromagnetic phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with
in Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal and generic standards covering a hazard are not applicable since they have been taken into
consideration when developing the general and particular requirements for the IEC 60335 series of standards. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
For motor-compressors, testing in accordance with this standard is an option and cannot be
required as a precondition for testing the complete appliance, for example by reference in
Clause 24 of a part 2 of IEC 60335. However, testing of the appliance should be reduced if an
incorporated motor-compressor including its protection system or control system, if any,
complies with this standard.
If testing of the motor-compressor includes testing in accordance with Annex AA,
temperatures of the motor-compressor windings, housing and other parts related to the
motor-compressor, such as terminals, internal wiring and insulating materials, are not
measured when the complete appliance in which the motor-compressor is used is tested.
These requirements apply to sealed (hermetic and semi-hermetic type) motor-compressors
with their associated starting, cooling capacity control and protection systems, tested
separately under the most severe conditions of the refrigerating system operation which,
within reasonable limits, could occur in the applications for which they are used.
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In particular, the construction detail inspection and locked-rotor testing may be done
separately on the motor-compressor, thereby eliminating the need for inspection and testing
when the motor-compressor is applied to many different appliances and factory-built
assemblies.
Operational tests may also be conducted on the motor-compressor separately in certain
circumstances. The specification for this type testing is provided in Annex AA. However, the
tests of the existing standards relevant to the given kind of application, such as IEC 60335-2-
24 and IEC 60335-2-40, may need to be conducted on the final application and used as the
final determination of acceptability.
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HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-34: Particular requirements for motor-compressors
1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of sealed (hermetic and semi-hermetic type)
motor-compressors, their protection and control systems, if any, which are intended for use
in equipment for household and similar purposes and which conform with the standards
applicable to such equipment. It applies to motor-compressors tested separately, under the
most severe conditions that may be expected to occur in normal use, their rated voltage
being not more than 250 V for single-phase motor-compressors and 480 V for other motor-
compressors.
This standard also covers
– multi-speed motor-compressors, that are motor-compressors, the speed of which can
be set to different values;
– variable capacity motor-compressors, that are motor-compressors where the capacity
of the compressor is controlled at fixed speeds.
NOTE 101 Examples of equipment which contain motor-compressors are
– refrigerators, food freezers and ice makers (IEC 60335-2-24);
– air-conditioners, electric heat pumps and dehumidifiers (IEC 60335-2-40);
– commercial dispensing appliances and vending machines (IEC 60335-2-75);
– factory-built assemblies for transferring heat in applications for refrigerating, air-conditioning or heating
purposes or a combination of such purposes.
This standard does not supersede the requirements of standards relevant to the particular
appliance in which the motor-compressor is used. However, if the motor-compressor type
used complies with this standard, the tests for the motor-compressor specified in the
particular appliance standard may not need to be made in the particular appliance or
assembly. If the motor-compressor control system is associated with the particular
appliance control system, additional tests may be necessary on the final appliance.
So far as is practical, this standard deals with the common hazards presented by motor-
compressors used in appliances which are encountered by all persons in and around the
home. However, it does not in general take into account
– the use of appliances by young children or infirm persons without supervision;
– playing with the appliances by young children.
NOTE 102 Attention is drawn to the fact that
– for motor-compressors intended to be used in appliances in vehicles or on board ships, additional require-
ments may be necessary;
– in many countries, additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour and similar authorities.
NOTE 103 This standard does not apply to
– motor-compressors designed exclusively for industrial purposes;
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– motor-compressors used in appliances intended to be used in locations where special conditions prevail, such
as the presence of a corrosive or explosive atmosphere (dust, vapour or gas).
NOTE 104 If motor-compressors for refrigerant R-744 used in appliances with a transcritical refrigeration
system are equipped with pressure relief devices, compliance with the requirements for these devices is checked
during the tests on the final appliance.
2 Normative references
This clause of Part 1 is applicable, except as follows.
Addition:
IEC 60079-15:2010, Explosive atmospheres – Part 15: Equipment protection by type of
protection ”n”
IEC 60851-4, Methods of test for winding wires – Part 4: Chemical properties
IEC 60851-5:2008, Winding wires – Test methods – Part 5: Electrical properties
ISO 7010, Graphical symbols – Safety colours and safety signs – Registered safety signs
3 Terms and definitions
This clause of Part 1 is applicable, except as follows.
3.101
motor-compressor
appliance consisting of the mechanical mechanism of the compressor and the motor, both of
which are enclosed in the same sealed housing, with no external shaft seals, and with the
motor operating in a refrigerant atmosphere with or without oil
Note 1 to entry: The housing may be permanently sealed, such as by welding or brazing (hermetic motor-
compressor), or may be sealed by gasketted joints (semi-hermetic motor-compressor). A terminal box, a
terminal box cover, and other electrical components or an electronic control system may be included.
Note 2 to entry: Hereafter, the term motor-compressor will be used to designate either a hermetic motor-
compressor or semi-hermetic motor-compressor.
3.102
housing
sealed enclosure for the motor-compressor, which contains the compressor mechanism and
the motor, and which is subjected to refrigerant pressures
3.103
thermal motor-protector
automatic control, built-in or fitted on a motor-compressor, that is specifically intended to
protect the motor-compressor against over-heating due to running overload and failure to
start
Note 1 to entry: This control carries motor-compressor current and is sensitive to one or both of the following:
– motor-compressor temperature;
– motor-compressor current.
Note 2 to entry: The control is capable of being reset (either manually or automatically) when its temperature falls
to the reset value.
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3.104
motor-compressor protection system
thermal motor protector and associated components, if any, or protective electronic
circuit fully or partly separate or integrated into the motor-compressor control system and
which is specifically intended to protect the motor-compressor against over-heating due to
running overload or failure to start
Note 1 to entry: The control carries motor-compressor current and is sensitive to one or both of the following:
– motor-compressor temperature;
– motor-compressor current.
3.105
motor-compressor control system
system comprising one or more electrical or electronic components, or electronic circuits
that provides at least one of the following:
– motor-compressor starting control functions;
– motor-compressor cooling capacity control functions
3.106
starting relay
electrically operated control device intended for integration or incorporation into a motor-
compressor and used within the motor-compressor circuit to control the starting of single-
phase motor-compressors
3.107
application category
back pressure relative to the evaporation temperature range over which the motor-
compressor operates
Note 1 to entry: For the purpose of this standard, the following classifications of application categories are made
relative to the evaporation temperature range:
– low back pressure (LBP): denotes an evaporation temperature range from equal to or less than –35 °C to
–15 °C;
– medium back pressure (MBP): denotes an evaporation temperature range from –20 °C to 0 °C;
– high back pressure (HBP): denotes an evaporation temperature range from –5 °C to equal to or greater than
+15 °C.
3.108
transcritical refrigeration system
refrigeration system where the pressure in the high pressure side is above the pressure
where the vapour and liquid states of the refrigerant can coexist in thermodynamic equilibrium
3.109
design pressure
gauge pressure that has been assigned to a transcritical refrigeration system
Note 1 to entry: It is specified for the high pressure side of a refrigeration system.
3 110
pressure relief device
pressure sensing device, intended to reduce pressure automatically when pressures within
the refrigeration system exceed the preset pressure of the device
Note 1 to entry: This device has no provisions for setting by the end user.
3.111
two-stage motor-compressor
motor-compressor comprising two compressors and one motor in a single housing
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4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable, except as follows.
5.2 Addition:
At least one additional sample is required for the tests of clause 19, however further samples
may also be provided or are needed.
For the test of 22.7, two samples of the housing are required.
5.7 Replacement:
Tests are carried out in an ambient temperature of 20 °C 5 °C.
5.8.2 Addition:
Motor-compressors with self-resetting motor-compressor protection systems, and
designed for more than one rated voltage, are subjected to the tests of 19.101 and 19.103 at
the highest voltage.
5.10 Addition:
For the tests of Clause 19, the additional sample or samples shall be identical in all respects
to the test sample, charged with oil, if necessary, and vapour refrigerant. The sample has to
be provided with the motor-compressor protection system, starting relay, start capacitor,
run capacitor and control system, if any, as specified by the manufacturer, except that the
rotor shall have been locked by the manufacturer.
The manufacturer or responsible agent shall provide the following information for each type of
motor-compressor submitted for the tests:
– type (synthetic or cellulosic) of winding insulation;
– refrigerant identification:
a) for a single component refrigerant, by at least one of the following:
chemical name;
chemical formula;
refrigerant number;
b) for a blended refrigerant, at least one of the following:
chemical name and nominal proportion of each of the components;
chemical formula and nominal proportion of each of the components;
refrigerant number and nominal proportion of each of the components;
refrigerant number of the refrigerant blend;
– types and quantity of oil to be used if the test samples which use oil are not already
charged;
– application category or application categories for motor-compressors classified as
being tested with Annex AA;
– whether a supply cord can be connected directly to terminals on the motor-compressor;
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– for motor-compressors intended for appliances with a transcritical refrigeration
system, the test pressure for the high pressure side if higher than the minimum test
pressure.
5.11 Replacement:
For motor-compressors which can be used in appliances where the supply cord is
connected directly to terminals on the motor-compressor, the test sample shall be provided
with a supply cord.
NOTE 101 Any additional samples required for testing need not be provided with a supply cord.
5.101 Motor-compressors, including those with crank-case heaters, are tested as motor-
operated appliances.
5.102 With regard to 6.104, protective devices other than the declared device under test
shall be disabled during the tests of Annex AA and Clause 19. If multiple protective devices
are declared, each shall be tested independently.
5.103 For cascade systems comprising two or more motor-compressor circuits, each motor-
compressor circuit is tested separately in the end product. IEC 60335-2-34 is not applicable
for the system but each motor-compressor can be tested according to this standard.
6 Classification
This clause of Part 1 is applicable, except as follows.
6.101 Motor-compressors not incorporating an electronic circuit are classified as being
tested with Annex AA or without Annex AA.
Motor-compressors incorporating an electronic circuit are classified as being tested with
Annex AA.
Motor-compressors using refrigerant R744 shall not be classified as being tested with
Annex AA.
Motor-compressors can be classified as being tested with Annex AA only if the motor-
compressor in combination with the motor-compressor protection system or motor-
compressor control system, if any, can be configured to operate so as to deliver maximum
cooling capacity, independently of any input sensors that are only provided as part of the final
application.
NOTE Motor-compressors classified as being tested without Annex AA and their protection system or control
system, if any, are normally subjected to a heating test as a complete system in the final application in accordance
with the appropriate appliance standard.
Compliance is checked by
– the tests of this standard including the tests in Annex AA, for motor-compressors tested
with Annex AA;
– the tests of this standard but not including the tests in Annex AA, for motor-compressors
tested without Annex AA.
6.102 Motor compressors are classified as being
– intended for direct connection of the appliance supply cord to the motor-compressor
terminals, or
– 14 – IEC 60335-2-34:2012
+AMD1:2015 CSV © IEC 2015
– not intended for direct connection of the appliance supply cord to the motor-compressor
terminals.
NOTE 1 Motor-compressors can in both cases be delivered with or without the external components necessary
for connection of the supply cord.
NOTE 2 Motor-compressors intended for direct connection of the appliance supply cord to their terminals can
also be used without the supply cord being connected directly to their terminals.
NOTE 3 If the motor-compressor is used without the relevant components or with components different from
those specified by the manufacturer, additional testing in accordance with the appropriate appliance standard can
be necessary.
Compliance is checked by inspection and by the relevant tests.
6.103 Motor-compressors are classified as being protected by protective electronic
circuits or not being protected by protective electronic circuits.
This does not preclude the protective electronic circuits being provided in the end product,
in which case many of the tests of this standard shall be conducted on the end product.
Compliance is checked by inspection and by the relevant tests.
6.104 The motor-compressor manufacturer shall declare the means of motor protection,
thermal motor protector, impedance protection, protective electronic circuit, or a
combination of the above.
Compliance is checked by inspection and by the relevant tests.
6.105 Motor-compressors using refrigerant R744 shall be classified as used in a
transcritical refrigeration system or in a non-transcritical refrigeration system.
Compliance is checked by inspection and by the relevant tests.
7 Marking and instructions
This clause of Part 1 is applicable, except as follows.
7.1 Modification:
The rated power input or rated current need not be marked.
Addition:
Motor-compressors suitable for use with a flammable refrigerant shall be marked with
symbol ISO 7010 W021.
7.5 Not applicable.
7.6 Addition:
Symbol ISO 7010 W021 Warning; flammable materials
7.7 Not applicable.
7.12 Not applicable, except 7.12.1 which is applicable.
+AMD1:2015 CSV © IEC 2015
7.13 Not applicable.
7.101 Refrigerants that can be used with the motor-compressor shall be listed in the
instructions.
Compliance is checked by inspection.
8 Protection against access to live parts
This clause of Part 1 is applicable.
9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is not applicable.
11 Heating
This clause of Part 1 is not applicable.
NOTE 101 For motor-compressors, this clause of Part 1 can be covered by Annex AA.
12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is not applicable, except 13.3 as required by 19.104.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable, except as follows.
15.3 Addition:
NOTE 101 Motor-compressors with glass-insulated terminals and without any external control devices,
protectors or other components need not be tested.
16 Leakage current and electric strength
This clause of Part 1 is applicable.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
– 16 – IEC 60335-2-34:2012
+AMD1:2015 CSV © IEC 2015
18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable, except as follows.
19.1 Modification:
Replace the test specification by the following:
Motor-compressors are submitted to the tests of 19.14, 19.15, 19.101, 19.102, 19.103 and,
additionally, if so required by the classification of 6.101, to the tests specified in Annex AA.
Motor-compressors incorporating electronic circuits are also subjected to the tests of
19.11 and 19.12.
Only one abnormal condition is simulated each time.
Compliance with the tests of 19.11 and 19.12 is checked as described in 19.13. Compliance
with the tests of 19.101, 19.102 and 19.103 is checked as described in 19.104. Compliance
with the tests of Annex AA is checked as described in Annex AA.
19.2 to 19.10 Not applicable.
19.11.2 Addition:
For simulation of the fault conditions, a motor-compressor incorporating an electronic
circuit is connected to the substitute refrigeration circuit of Figure AA.1 and operated under
the conditions given in Clause AA.5. The condensing temperature applied being 5 K lower
than that which caused the motor-compressor protective electronic circuit to operate or
the motor-compressor to stall during the test of Clause AA.5.
19.11.3 Replacement:
If the motor-compressor is classified as being protected by a protective electronic circuit
and if this protective electronic circuit operates to ensure compliance with Clause 19 and
Annex AA, the tests of 19.101, 19.102, 19.103 and Annex AA are repeated with a single fault
simulated, as indicated in a) to g) of 19.11.2.
However, the test of Annex AA is not repeated if during the test of Annex AA, for motor-
compressors classified as being tested with Annex AA, the motor-compressor protection
system did not operate. The test of Annex AA is also not repeated on motor-compressors
that are classified as being tested without Annex AA.
19.11.4 Addition:
If the tests have to be carried out, they shall be carried out in the end product application.
NOTE 101 The application of these tests in this part 2 is not mandatory since they are conducted in the end
product application.
19.13 Addition:
If the motor-compressor is intended to use flammable refrigerants, and if during the tests of
19.11.2 and 19.11.3 any electrical component produced sparks or arcs, this shall be reported
+AMD1:2015 CSV © IEC 2015
unless the component was an intentionally weak part or a non-self-resetting protective
device.
19.14 Replacement:
Motor-compressors are operated under the conditions of Clause AA.1. Any contactor or
relay contact that operates under the conditions of Clause AA.1 is short-circuited.
If a relay or contactor with more than one contact is used, all contacts are short-circuited at
the same time.
Any relay or contactor which operates only in order to ensure that the motor-compressor is
energized for normal use and that does not otherwise operate in normal use is not short-
circuited.
If more than one relay or contactor operates in Clause AA.1, each such relay or contactor is
short-circuited in turn.
For motor-compressors that use alternate start capacitors, the test shall be carried out using
each alternate start capacitor in turn.
The test is only performed on motor-compressors classified as being tested with Annex AA.
NOTE 1 For motor-compressors not classified as being tested with Annex AA, this test will be performed on the
final product.
NOTE 2 If the motor-compressor has several modes of operation, the tests are carried out with the motor-
compressor operating in each mode, if necessary.
19.101 The motor-compressor and motor-compressor protection system, together with
all their associated components which operate under locked-rotor conditions, are connected
in the circuit shown in Figure 101 and supplied with rated voltage as specified in 5.8.2.
NOTE 1 The associated components which comply with the requirements in Clause 24 are not evaluated by this
test.
For motor-compressors with a non-self-resetting thermal motor-compressor protection
system, the motor-compressor is operated until a sufficient number of operations have been
made to ensure that continuous automatic recycling does not occur. The number of operations
should, however, not be less than
...
IEC 60335-2-34 ®
Edition 5.2 2016-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
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inside
Household and similar electrical appliances – Safety –
Part 2-34: Particular requirements for motor-compressors
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IEC 60335-2-34 ®
Edition 5.2 2016-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-34: Particular requirements for motor-compressors
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 97.040.30 ISBN 978-2-8322-3763-2
IEC 60335-2-34 ®
Edition 5.2 2016-11
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Household and similar electrical appliances – Safety –
Part 2-34: Particular requirements for motor-compressors
– 2 – IEC 60335-2-34:2012+AMD1:2015
+AMD2:2016 CSV © IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 9
2 Normative references . 10
3 Terms and definitions . 10
4 General requirement . 12
5 General conditions for the tests . 12
6 Classification . 13
7 Marking and instructions . 14
8 Protection against access to live parts . 15
9 Starting of motor-operated appliances . 15
10 Power input and current . 15
11 Heating . 15
12 Void. 15
13 Leakage current and electric strength at operating temperature . 15
14 Transient overvoltages . 15
15 Moisture resistance . 15
16 Leakage current and electric strength . 16
17 Overload protection of transformers and associated circuits . 16
18 Endurance . 16
19 Abnormal operation . 16
20 Stability and mechanical hazards . 21
21 Mechanical strength . 21
22 Construction . 21
23 Internal wiring . 25
24 Components . 25
25 Supply connection and external flexible cords . 26
26 Terminals for external conductors . 26
27 Provision for earthing . 26
28 Screws and connections . 26
29 Clearances, creepage distances and solid insulation . 26
30 Resistance to heat and fire . 27
31 Resistance to rusting . 27
32 Radiation, toxicity and similar hazards . 27
Annexes . 29
Annex C (normative) Ageing test on motors . 29
Annex D (normative) Thermal motor protectors . 29
Annex AA (normative) Running overload tests for motor-compressors classified as
tested with Annex AA . 30
Annex BB (normative) Winding wire insulation compatibility tests . 39
Annex CC (normative) Tie cords and insulation compatibility tests . 41
+AMD2:2016 CSV © IEC 2016
Annex DD (normative) Non-sparking “n” electrical apparatus . 43
Bibliography . 44
Figure 101 – Supply circuit for the locked-rotor test of a single-phase motor-
compressor . 28
Figure AA.1 – Substitute refrigeration circuit . 38
Table 101 – Minimum high side test pressures . 22
Table 102 – Minimum low side test pressures . 24
Table AA.1 – Substitute refrigeration circuit conditions for operating under running
overload conditions . 32
Table AA.2 – Substitute refrigeration circuit conditions for operating under maximum
and minimum load conditions . 35
Table AA.3 – Steps for increasing the load on the motor-compressor . 37
Table BB.1 – Time temperature heating cycles . 40
Table CC.1 – Time temperature heating cycles . 42
– 4 – IEC 60335-2-34:2012+AMD1:2015
+AMD2:2016 CSV © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-34: Particular requirements for motor-compressors
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendments has been prepared
for user convenience.
IEC 60335-2-34 edition 5.2 contains the fifth edition (2012-05) [documents 61C/508/FDIS and
61C/517/RVD], its amendment 1 (2015-05) [documents 61C/597/FDIS and 61C/603/RVD] and its
corrigendum (2015-06), and its amendment 2 (2016-11) [documents 61C/686/FDIS and 61C/691/
RVD].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendments 1 and 2. Additions and deletions are displayed in red, with deletions
being struck through. A separate Final version with all changes accepted is available in this
publication.
+AMD2:2016 CSV © IEC 2016
This part of International Standard IEC 60335 has been prepared by subcommittee 61C:
Safety of refrigeration appliances for household and commercial use, of IEC technical
committee 61: Safety of household and similar electrical appliances.
The principal changes in this edition as compared with the fourth edition of IEC 60335-2-34
are as follows (minor changes are not listed):
– some notes have been deleted or converted to normative text (1, 6.103, 19.14, 22.7,
Figure 101);
– manufacturer must declare the type of motor protection used (5.102, 6.104);
– tests to fault-test motor-compressors incorporating electronic circuits introduced
(19.11.2, AA.5);
– application of the EMP tests clarified (19.11.4);
– testing of contactors and relays associated with motor-compressors introduced (19.14);
– tables 101 and 102 updated and corrected;
– running overload test conditions extended (AA.1, AA.2, AA.3, AA.4, AA.5).
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fifth edition (2010) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to
convert that publication into the IEC standard: Safety requirements for electrical motor-
compressors.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. When this standard states "addition", "modification" or "replacement",
the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in smaller roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
A list of all parts of the IEC 60335 series, under the general title Household and similar
electrical appliances – Safety, can be found on the IEC website.
– 6 – IEC 60335-2-34:2012+AMD1:2015
+AMD2:2016 CSV © IEC 2016
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 12 months or later than 36 months from the date of publication.
The following differences exist in the countries indicated below.
– 7.1: The locked-rotor current marking is required for some motor-compressors (USA).
– 22.7: Different test pressures are used (Japan, USA).
The contents of the corrigendun of June 2017 have been included in this copy.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
+AMD2:2016 CSV © IEC 2016
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in
normal use taking into account the manufacturer's instructions It also covers abnormal
situations that can be expected in practice and takes into account the way in which
electromagnetic phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with
in Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal and generic standards covering a hazard are not applicable since they have been taken into
consideration when developing the general and particular requirements for the IEC 60335 series of standards. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
For motor-compressors, testing in accordance with this standard is an option and cannot be
required as a precondition for testing the complete appliance, for example by reference in
Clause 24 of a part 2 of IEC 60335. However, testing of the appliance should be reduced if an
incorporated motor-compressor including its protection system or control system, if any,
complies with this standard.
If testing of the motor-compressor includes testing in accordance with Annex AA,
temperatures of the motor-compressor windings, housing and other parts related to the
motor-compressor, such as terminals, internal wiring and insulating materials, are not
measured when the complete appliance in which the motor-compressor is used is tested.
These requirements apply to sealed (hermetic and semi-hermetic type) motor-compressors
with their associated starting, cooling capacity control and protection systems, tested
separately under the most severe conditions of the refrigerating system operation which,
within reasonable limits, could occur in the applications for which they are used.
– 8 – IEC 60335-2-34:2012+AMD1:2015
+AMD2:2016 CSV © IEC 2016
In particular, the construction detail inspection and locked-rotor testing may be done
separately on the motor-compressor, thereby eliminating the need for inspection and testing
when the motor-compressor is applied to many different appliances and factory-built
assemblies.
Operational tests may also be conducted on the motor-compressor separately in certain
circumstances. The specification for this type testing is provided in Annex AA. However, the
tests of the existing standards relevant to the given kind of application, such as IEC 60335-2-
24 and IEC 60335-2-40, may need to be conducted on the final application and used as the
final determination of acceptability.
+AMD2:2016 CSV © IEC 2016
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-34: Particular requirements for motor-compressors
1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of sealed (hermetic and semi-hermetic type)
motor-compressors, their protection and control systems, if any, which are intended for use
in equipment for household and similar purposes and which conform with the standards
applicable to such equipment. It applies to motor-compressors tested separately, under the
most severe conditions that may be expected to occur in normal use, their rated voltage
being not more than 250 V for single-phase motor-compressors and 480 600 V for other
motor-compressors.
This standard also covers
– multi-speed motor-compressors, that are motor-compressors, the speed of which can
be set to different values;
– variable capacity motor-compressors, that are motor-compressors where the capacity
of the compressor is controlled at fixed speeds.
NOTE 101 Examples of equipment which contain motor-compressors are
– refrigerators, food freezers and ice makers (IEC 60335-2-24);
– air-conditioners, electric heat pumps and dehumidifiers (IEC 60335-2-40);
– commercial dispensing appliances and vending machines (IEC 60335-2-75);
– factory-built assemblies for transferring heat in applications for refrigerating, air-conditioning or heating
purposes or a combination of such purposes.
This standard does not supersede the requirements of standards relevant to the particular
appliance in which the motor-compressor is used. However, if the motor-compressor type
used complies with this standard, the tests for the motor-compressor specified in the
particular appliance standard may not need to be made in the particular appliance or
assembly. If the motor-compressor control system is associated with the particular
appliance control system, additional tests may be necessary on the final appliance.
So far as is practical, this standard deals with the common hazards presented by motor-
compressors used in appliances which are encountered by all persons in and around the
home. However, it does not in general take into account
– the use of appliances by young children or infirm persons without supervision;
– playing with the appliances by young children.
NOTE 102 Attention is drawn to the fact that
– for motor-compressors intended to be used in appliances in vehicles or on board ships, additional require-
ments may be necessary;
– in many countries, additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour and similar authorities.
NOTE 103 This standard does not apply to
– motor-compressors designed exclusively for industrial purposes;
– 10 – IEC 60335-2-34:2012+AMD1:2015
+AMD2:2016 CSV © IEC 2016
– motor-compressors used in appliances intended to be used in locations where special conditions prevail, such
as the presence of a corrosive or explosive atmosphere (dust, vapour or gas).
NOTE 104 If motor-compressors for refrigerant R-744 used in appliances with a transcritical refrigeration
system are equipped with pressure relief devices, compliance with the requirements for these devices is checked
during the tests on the final appliance.
2 Normative references
This clause of Part 1 is applicable, except as follows.
Addition:
IEC 60079-15:2010, Explosive atmospheres – Part 15: Equipment protection by type of
protection ”n”
IEC 60851-4, Methods of test for winding wires – Part 4: Chemical properties
IEC 60851-5:2008, Winding wires – Test methods – Part 5: Electrical properties
ISO 7010, Graphical symbols – Safety colours and safety signs – Registered safety signs
3 Terms and definitions
This clause of Part 1 is applicable, except as follows.
3.101
motor-compressor
appliance consisting of the mechanical mechanism of the compressor and the motor, both of
which are enclosed in the same sealed housing, with no external shaft seals, and with the
motor operating in a refrigerant atmosphere with or without oil
Note 1 to entry: The housing may be permanently sealed, such as by welding or brazing (hermetic motor-
compressor), or may be sealed by gasketted joints (semi-hermetic motor-compressor). A terminal box, a
terminal box cover, and other electrical components or an electronic control system may be included.
Note 2 to entry: Hereafter, the term motor-compressor will be used to designate either a hermetic motor-
compressor or semi-hermetic motor-compressor.
3.102
housing
sealed enclosure for the motor-compressor, which contains the compressor mechanism and
the motor, and which is subjected to refrigerant pressures
3.103
thermal motor-protector
automatic control, built-in or fitted on a motor-compressor, that is specifically intended to
protect the motor-compressor against over-heating due to running overload and failure to
start
Note 1 to entry: This control carries motor-compressor current and is sensitive to one or both of the following:
– motor-compressor temperature;
– motor-compressor current.
Note 2 to entry: The control is capable of being reset (either manually or automatically) when its temperature falls
to the reset value.
+AMD2:2016 CSV © IEC 2016
3.104
motor-compressor protection system
thermal motor protector and associated components, if any, or protective electronic
circuit fully or partly separate or integrated into the motor-compressor control system and
which is specifically intended to protect the motor-compressor against over-heating due to
running overload or failure to start
Note 1 to entry: The control carries motor-compressor current and is sensitive to one or both of the following:
– motor-compressor temperature;
– motor-compressor current.
3.105
motor-compressor control system
system comprising one or more electrical or electronic components, or electronic circuits
that provides at least one of the following:
– motor-compressor starting control functions;
– motor-compressor cooling capacity control functions
3.106
starting relay
electrically operated control device intended for integration or incorporation into a motor-
compressor and used within the motor-compressor circuit to control the starting of single-
phase motor-compressors
3.107
application category
back pressure relative to the evaporation temperature range over which the motor-
compressor operates
Note 1 to entry: For the purpose of this standard, the following classifications of application categories are made
relative to the evaporation temperature range:
– low back pressure (LBP): denotes an evaporation temperature range from equal to or less than –35 °C to
–15 °C;
– medium back pressure (MBP): denotes an evaporation temperature range from –20 °C to 0 °C;
– high back pressure (HBP): denotes an evaporation temperature range from –5 °C to equal to or greater than
+15 °C.
3.108
transcritical refrigeration system
refrigeration system where the pressure in the high pressure side is above the pressure
where the vapour and liquid states of the refrigerant can coexist in thermodynamic equilibrium
3.109
design pressure
gauge pressure that has been assigned to a transcritical refrigeration system
Note 1 to entry: It is specified for the high pressure side of a refrigeration system.
3 110
pressure relief device
pressure sensing device, intended to reduce pressure automatically when pressures within
the refrigeration system exceed the preset pressure of the device
Note 1 to entry: This device has no provisions for setting by the end user.
3.111
two-stage motor-compressor
motor-compressor comprising two compressors and one motor in a single housing
– 12 – IEC 60335-2-34:2012+AMD1:2015
+AMD2:2016 CSV © IEC 2016
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable, except as follows.
5.2 Addition:
At least one additional sample is required for the tests of clause 19, however further samples
may also be provided or are needed.
For the test of 22.7, two samples of the housing are required.
5.7 Replacement:
Tests are carried out in an ambient temperature of 20 °C ± 5 °C.
5.8.2 Addition:
Motor-compressors with self-resetting motor-compressor protection systems, and
designed for more than one rated voltage, are subjected to the tests of 19.101 and 19.103 at
the highest voltage.
5.10 Addition:
For the tests of Clause 19, the additional sample or samples shall be identical in all respects
to the test sample, charged with oil, if necessary, and vapour refrigerant. The sample has to
be provided with the motor-compressor protection system, starting relay, start capacitor,
run capacitor and control system, if any, as specified by the manufacturer, except that the
rotor shall have been locked by the manufacturer.
The manufacturer or responsible agent shall provide the following information for each type of
motor-compressor submitted for the tests:
– type (synthetic or cellulosic) of winding insulation;
– refrigerant identification:
a) for a single component refrigerant, by at least one of the following:
• chemical name;
• chemical formula;
• refrigerant number;
b) for a blended refrigerant, at least one of the following:
• chemical name and nominal proportion of each of the components;
• chemical formula and nominal proportion of each of the components;
• refrigerant number and nominal proportion of each of the components;
• refrigerant number of the refrigerant blend;
– types and quantity of oil to be used if the test samples which use oil are not already
charged;
– application category or application categories for motor-compressors classified as
being tested with Annex AA;
– whether a supply cord can be connected directly to terminals on the motor-compressor;
+AMD2:2016 CSV © IEC 2016
– for motor-compressors intended for appliances with a transcritical refrigeration
system, the test pressure for the high pressure side if higher than the minimum test
pressure.
5.11 Replacement:
For motor-compressors which can be used in appliances where the supply cord is
connected directly to terminals on the motor-compressor, the test sample shall be provided
with a supply cord.
NOTE 101 Any additional samples required for testing need not be provided with a supply cord.
5.101 Motor-compressors, including those with crank-case heaters, are tested as motor-
operated appliances.
5.102 With regard to 6.104, protective devices other than the declared device under test
shall be disabled during the tests of Annex AA and Clause 19. If multiple protective devices
are declared, each shall be tested independently.
5.103 For cascade systems comprising two or more motor-compressor circuits, each motor-
compressor circuit is tested separately in the end product. IEC 60335-2-34 is not applicable
for the system but each motor-compressor can be tested according to this standard.
6 Classification
This clause of Part 1 is applicable, except as follows.
6.101 Motor-compressors not incorporating without an incorporated or associated
electronic circuit are classified as being tested with Annex AA or without Annex AA.
Motor-compressors incorporating with an incorporated or associated electronic circuit are
classified as being tested with Annex AA.
Motor-compressors using refrigerant R744 shall not be classified as being tested with
Annex AA.
Motor-compressors can be classified as being tested with Annex AA only if the motor-
compressor in combination with the motor-compressor protection system or motor-
compressor control system, if any, can be configured to operate so as to deliver maximum
cooling capacity, independently of any input sensors that are only provided as part of the final
application.
NOTE Motor-compressors classified as being tested without Annex AA and their protection system or control
system, if any, are normally subjected to a heating test as a complete system in the final application in accordance
with the appropriate appliance standard.
Compliance is checked by
– the tests of this standard including the tests in Annex AA, for motor-compressors tested
with Annex AA;
– the tests of this standard but not including the tests in Annex AA, for motor-compressors
tested without Annex AA.
6.102 Motor compressors are classified as being
– intended for direct connection of the appliance supply cord to the motor-compressor
terminals, or
– 14 – IEC 60335-2-34:2012+AMD1:2015
+AMD2:2016 CSV © IEC 2016
– not intended for direct connection of the appliance supply cord to the motor-compressor
terminals.
NOTE 1 Motor-compressors can in both cases be delivered with or without the external components necessary
for connection of the supply cord.
NOTE 2 Motor-compressors intended for direct connection of the appliance supply cord to their terminals can
also be used without the supply cord being connected directly to their terminals.
NOTE 3 If the motor-compressor is used without the relevant components or with components different from
those specified by the manufacturer, additional testing in accordance with the appropriate appliance standard can
be necessary.
Compliance is checked by inspection and by the relevant tests.
6.103 Motor-compressors are classified as being protected by protective electronic
circuits or not being protected by protective electronic circuits.
This does not preclude the protective electronic circuits being provided in the end product,
in which case many of the tests of this standard shall be conducted on the end product.
Compliance is checked by inspection and by the relevant tests.
6.104 The motor-compressor manufacturer shall declare the means of motor protection,
thermal motor protector, impedance protection, protective electronic circuit, or a
combination of the above.
Compliance is checked by inspection and by the relevant tests.
6.105 Motor-compressors using refrigerant R744 shall be classified as used in a
transcritical refrigeration system or in a non-transcritical refrigeration system.
Compliance is checked by inspection and by the relevant tests.
7 Marking and instructions
This clause of Part 1 is applicable, except as follows.
7.1 Modification:
The rated power input or rated current need not be marked.
Addition:
Motor-compressors suitable for use with a flammable refrigerant shall be marked with
symbol ISO 7010 W021.
7.5 Not applicable.
7.6 Addition:
Symbol ISO 7010 W021 Warning; flammable materials
+AMD2:2016 CSV © IEC 2016
7.7 Not applicable.
7.12 Not applicable, except 7.12.1 which is applicable.
7.13 Not applicable.
7.101 Refrigerants that can be used with the motor-compressor shall be listed in the
instructions.
Compliance is checked by inspection.
8 Protection against access to live parts
This clause of Part 1 is applicable.
9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is not applicable.
11 Heating
This clause of Part 1 is not applicable.
NOTE 101 For motor-compressors, this clause of Part 1 can be covered by Annex AA.
12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is not applicable, except 13.3 as required by 19.104.
13.3 Addition:
In Table 4, add the following to table footnote a:
The test voltage for 600 V multi-phase appliances is that specified for a working voltage > 250 V where U is taken
as the rated voltage.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable, except as follows.
15.3 Addition:
– 16 – IEC 60335-2-34:2012+AMD1:2015
+AMD2:2016 CSV © IEC 2016
NOTE 101 Motor-compressors with glass-insulated terminals and without any external control devices,
protectors or other components need not be tested.
16 Leakage current and electric strength
This clause of Part 1 is applicable except as follows.
16.3 In Table 7 add the following to table footnote a:
The test voltage for 600 V multi-phase appliances is that specified for a working voltage > 250 V where U is taken
as the rated voltage.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable, except as follows.
19.1 Modification:
Replace the test specification by the following:
Motor-compressors are submitted to the tests of 19.14, 19.15, 19.101, 19.102, 19.103 and,
additionally, if so required by the classification of 6.101, to the tests specified in Annex AA.
Motor-compressors incorporating electronic circuits are also subjected to the tests of
19.11 and 19.12.
Only one abnormal condition is simulated each time.
Compliance with the tests of 19.11 and 19.12 is checked as described in 19.13. Compliance
with the tests of 19.101, 19.102 and 19.103 is checked as described in 19.104. Compliance
with the tests of Annex AA is checked as described in Annex AA.
19.2 to 19.10 Not applicable.
19.11.2 Addition:
For simulation of the fault conditions, a motor-compressor incorporating an with its
incorporated or associated electronic circuit is connected to the substitute refrigeration
circuit of Figure AA.1 and operated under the conditions given in Clause AA.5. The
condensing temperature applied being 5 K lower than conditions applied are the step prior to
that which caused the motor-compressor protective electronic circuit device to operate or
the motor-compressor to stall during the tests of Clause AA.5.
19.11.3 Replacement:
If the motor-compressor is classified as being protected by a protective electronic circuit
and if this protective electronic circuit operates to ensure compliance with Clause 19 and
+AMD2:2016 CSV © IEC 2016
Annex AA, the tests of 19.101, 19.102, 19.103 and Annex AA are repeated with a single fault
simulated, as indicated in a) to g) of 19.11.2.
However, the test of Annex AA is not repeated if during the test of Annex AA, for motor-
compressors classified as being tested with Annex AA, the motor-compressor protection
system did not operate. The test of Annex AA is also not repeated on motor-compressors
that are classified as being tested without Annex AA.
19.11.4 Addition:
If the tests have to be carried out, they shall be carried out in the end product application.
NOTE 101 The application of these tests in this part 2 is not mandatory since they are conducted in the end
product application.
19.13 Addition:
If the motor-compressor is intended to use flammable refrigerants, and if during the tests of
19.11.2 and 19.11.3 any electrical component produced sparks or arcs, this shall be reported
unless the component was an intentionally weak part or a non-self-resetting protective
device.
19.14 Replacement:
Motor-compressors are operated under the conditions of Clause AA.1. Any contactor or
relay contact that operates under the conditions of Clause AA.1 is short-circuited.
If a relay or contactor with more than one contact is used, all contacts are short-circuited at
the same time.
Any relay or contactor which operates only in order to ensure that the motor-compressor is
energized for normal use and that does not otherwise operate in normal use is not short-
circuited.
If more than one relay or contactor operates in Clause AA.1, each such relay or contactor is
short-circuited in turn.
For motor-compressors that use alternate start capacitors, the test shall be carried out using
each alternate start capacitor in turn.
The test is only performed on motor-compressors classified as being tested with Annex AA.
NOTE 1 For motor-compressors not classi
...
IEC 60335-2-34 ®
Edition 5.0 2012-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-34: Particular requirements for motor-compressors
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-34: Exigences particulières pour les motocompresseurs
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IEC 60335-2-34 ®
Edition 5.0 2012-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-34: Particular requirements for motor-compressors
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-34: Exigences particulières pour les motocompresseurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX W
ICS 97.040.30 ISBN 978-2-83220-085-8
– 2 – 60335-2-34 © IEC:2012
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 9
2 Normative references . 10
3 Terms and definitions . 10
4 General requirement . 11
5 General conditions for the tests . 11
6 Classification . 13
7 Marking and instructions . 14
8 Protection against access to live parts . 14
9 Starting of motor-operated appliances . 14
10 Power input and current . 14
11 Heating . 14
12 Void. 14
13 Leakage current and electric strength at operating temperature . 14
14 Transient overvoltages . 14
15 Moisture resistance . 15
16 Leakage current and electric strength . 15
17 Overload protection of transformers and associated circuits . 15
18 Endurance . 15
19 Abnormal operation . 15
20 Stability and mechanical hazards . 20
21 Mechanical strength . 20
22 Construction . 20
23 Internal wiring . 23
24 Components . 23
25 Supply connection and external flexible cords . 23
26 Terminals for external conductors . 24
27 Provision for earthing . 24
28 Screws and connections . 24
29 Clearances, creepage distances and solid insulation . 24
30 Resistance to heat and fire . 25
31 Resistance to rusting . 25
32 Radiation, toxicity and similar hazards . 25
Annexes . 26
Annex C (normative) Ageing test on motors . 26
Annex D (normative) Thermal motor protectors . 26
Annex AA (normative) Running overload tests for motor-compressors classified as
tested with Annex AA . 27
Bibliography . 35
60335-2-34 © IEC:2012 – 3 –
Figure 101 – Supply circuit for the locked-rotor test of a single-phase motor-
compressor . 25
Figure AA.1 – Substitute refrigeration circuit . 34
Table 101 – Minimum high side test pressures . 21
Table 102 – Minimum low side test pressures . 22
Table AA.1 – Substitute refrigeration circuit conditions for operating under running
overload conditions . 29
Table AA.2 – Substitute refrigeration circuit conditions for operating under maximum
and minimum load conditions . 32
– 4 – 60335-2-34 © IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-34: Particular requirements for motor-compressors
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This part of International Standard IEC 60335 has been prepared by subcommittee 61C:
Safety of refrigeration appliances for household and commercial use, of IEC technical
committee 61: Safety of household and similar electrical appliances.
This fifth edition cancels and replaces the fourth edition published in 2002 including its
Amendment 1 (2004) and its amendment 2 (2008). It constitutes a technical revision.
The principal changes in this edition as compared with the fourth edition of IEC 60335-2-34
are as follows (minor changes are not listed):
– some notes have been deleted or converted to normative text (1, 6.103, 19.14, 22.7,
Figure 101);
– manufacturer must declare the type of motor protection used (5.102, 6.104);
– tests to fault-test motor-compressors incorporating electronic circuits introduced
(19.11.2, AA.5);
60335-2-34 © IEC:2012 – 5 –
– application of the EMP tests clarified (19.11.4);
– testing of contactors and relays associated with motor-compressors introduced (19.14);
– tables 101 and 102 updated and corrected;
– running overload test conditions extended (AA.1, AA.2, AA.3, AA.4, AA.5).
The text of this part of IEC 60335 is based on the following documents:
FDIS Report on voting
61C/508/FDIS 61C/517/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fifth edition (2010) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to
convert that publication into the IEC standard: Safety requirements for electrical motor-
compressors.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. When this standard states "addition", "modification" or "replacement",
the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in smaller roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
A list of all parts of the IEC 60335 series, under the general title Household and similar
electrical appliances – Safety, can be found on the IEC website.
– 6 – 60335-2-34 © IEC:2012
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 12 months or later than 36 months from the date of publication.
The following differences exist in the countries indicated below.
– 7.1: The locked-rotor current marking is required for some motor-compressors (USA).
– 22.7: Different test pressures are used (Japan, USA).
60335-2-34 © IEC:2012 – 7 –
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in
normal use taking into account the manufacturer's instructions It also covers abnormal
situations that can be expected in practice and takes into account the way in which
electromagnetic phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with
in Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal and generic standards covering a hazard are not applicable since they have been taken into
consideration when developing the general and particular requirements for the IEC 60335 series of standards. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
For motor-compressors, testing in accordance with this standard is an option and cannot be
required as a precondition for testing the complete appliance, for example by reference in
Clause 24 of a part 2 of IEC 60335. However, testing of the appliance should be reduced if an
incorporated motor-compressor including its protection system or control system, if any,
complies with this standard.
If testing of the motor-compressor includes testing in accordance with Annex AA,
temperatures of the motor-compressor windings, housing and other parts related to the
motor-compressor, such as terminals, internal wiring and insulating materials, are not
measured when the complete appliance in which the motor-compressor is used is tested.
These requirements apply to sealed (hermetic and semi-hermetic type) motor-compressors
with their associated starting, cooling capacity control and protection systems, tested
separately under the most severe conditions of the refrigerating system operation which,
within reasonable limits, could occur in the applications for which they are used.
– 8 – 60335-2-34 © IEC:2012
In particular, the construction detail inspection and locked-rotor testing may be done
separately on the motor-compressor, thereby eliminating the need for inspection and testing
when the motor-compressor is applied to many different appliances and factory-built
assemblies.
Operational tests may also be conducted on the motor-compressor separately in certain
circumstances. The specification for this type testing is provided in Annex AA. However, the
tests of the existing standards relevant to the given kind of application, such as IEC 60335-2-
24 and IEC 60335-2-40, may need to be conducted on the final application and used as the
final determination of acceptability.
60335-2-34 © IEC:2012 – 9 –
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-34: Particular requirements for motor-compressors
1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of sealed (hermetic and semi-hermetic type)
motor-compressors, their protection and control systems, if any, which are intended for use
in equipment for household and similar purposes and which conform with the standards
applicable to such equipment. It applies to motor-compressors tested separately, under the
most severe conditions that may be expected to occur in normal use, their rated voltage
being not more than 250 V for single-phase motor-compressors and 480 V for other motor-
compressors.
NOTE 101 Examples of equipment which contain motor-compressors are
– refrigerators, food freezers and ice makers (IEC 60335-2-24);
– air-conditioners, electric heat pumps and dehumidifiers (IEC 60335-2-40);
– commercial dispensing appliances and vending machines (IEC 60335-2-75);
– factory-built assemblies for transferring heat in applications for refrigerating, air-conditioning or heating
purposes or a combination of such purposes.
This standard does not supersede the requirements of standards relevant to the particular
appliance in which the motor-compressor is used. However, if the motor-compressor type
used complies with this standard, the tests for the motor-compressor specified in the
particular appliance standard may not need to be made in the particular appliance or
assembly. If the motor-compressor control system is associated with the particular
appliance control system, additional tests may be necessary on the final appliance.
So far as is practical, this standard deals with the common hazards presented by motor-
compressors used in appliances which are encountered by all persons in and around the
home. However, it does not in general take into account
– the use of appliances by young children or infirm persons without supervision;
– playing with the appliances by young children.
NOTE 102 Attention is drawn to the fact that
– for motor-compressors intended to be used in appliances in vehicles or on board ships, additional require-
ments may be necessary;
– in many countries, additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour and similar authorities.
NOTE 103 This standard does not apply to
– motor-compressors designed exclusively for industrial purposes;
– motor-compressors used in appliances intended to be used in locations where special conditions prevail, such
as the presence of a corrosive or explosive atmosphere (dust, vapour or gas).
NOTE 104 If motor-compressors for refrigerant R-744 used in appliances with a transcritical refrigeration
system are equipped with pressure relief devices, compliance with the requirements for these devices is checked
during the tests on the final appliance.
– 10 – 60335-2-34 © IEC:2012
2 Normative references
This clause of Part 1 is applicable.
3 Terms and definitions
This clause of Part 1 is applicable, except as follows.
3.101
motor-compressor
appliance consisting of the mechanical mechanism of the compressor and the motor, both of
which are enclosed in the same sealed housing, with no external shaft seals, and with the
motor operating in a refrigerant atmosphere with or without oil
Note 1 to entry: The housing may be permanently sealed, such as by welding or brazing (hermetic motor-
compressor), or may be sealed by gasketted joints (semi-hermetic motor-compressor). A terminal box, a
terminal box cover, and other electrical components or an electronic control system may be included.
Note 2 to entry: Hereafter, the term motor-compressor will be used to designate either a hermetic motor-
compressor or semi-hermetic motor-compressor.
3.102
housing
sealed enclosure for the motor-compressor, which contains the compressor mechanism and
the motor, and which is subjected to refrigerant pressures
3.103
thermal motor-protector
automatic control, built-in or fitted on a motor-compressor, that is specifically intended to
protect the motor-compressor against over-heating due to running overload and failure to
start
Note 1 to entry: This control carries motor-compressor current and is sensitive to one or both of the following:
– motor-compressor temperature;
– motor-compressor current.
Note 2 to entry: The control is capable of being reset (either manually or automatically) when its temperature falls
to the reset value.
3.104
motor-compressor protection system
thermal motor protector and associated components, if any, or protective electronic
circuit fully or partly separate or integrated into the motor-compressor control system and
which is specifically intended to protect the motor-compressor against over-heating due to
running overload or failure to start
Note 1 to entry: The control carries motor-compressor current and is sensitive to one or both of the following:
– motor-compressor temperature;
– motor-compressor current.
3.105
motor-compressor control system
system comprising one or more electrical or electronic components, or electronic circuits
that provides at least one of the following:
– motor-compressor starting control functions;
– motor-compressor cooling capacity control functions
60335-2-34 © IEC:2012 – 11 –
3.106
starting relay
electrically operated control device intended for integration or incorporation into a motor-
compressor and used within the motor-compressor circuit to control the starting of single-
phase motor-compressors
3.107
application category
back pressure relative to the evaporation temperature range over which the motor-
compressor operates
Note 1 to entry: For the purpose of this standard, the following classifications of application categories are
made relative to the evaporation temperature range:
– low back pressure (LBP): denotes an evaporation temperature range from equal to or less than –35 °C to
–15 °C;
– medium back pressure (MBP): denotes an evaporation temperature range from –20 °C to 0 °C;
– high back pressure (HBP): denotes an evaporation temperature range from –5 °C to equal to or greater than
+15 °C.
3.108
transcritical refrigeration system
refrigeration system where the pressure in the high pressure side is above the pressure
where the vapour and liquid states of the refrigerant can coexist in thermodynamic equilibrium
3.109
design pressure
gauge pressure that has been assigned to a transcritical refrigeration system
Note 1 to entry: It is specified for the high pressure side of a refrigeration system.
3 110
pressure relief device
pressure sensing device, intended to reduce pressure automatically when pressures within
the refrigeration system exceed the preset pressure of the device
Note 1 to entry: This device has no provisions for setting by the end user.
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable, except as follows.
5.2 Addition:
At least one additional sample is required for the tests of clause 19, however further samples
may also be provided or are needed.
For the test of 22.7, two samples of the housing are required.
5.7 Replacement:
Tests are carried out in an ambient temperature of 20 °C ± 5 °C.
– 12 – 60335-2-34 © IEC:2012
5.8.2 Addition:
Motor-compressors with self-resetting motor-compressor protection systems, and
designed for more than one rated voltage, are subjected to the tests of 19.101 and 19.103 at
the highest voltage.
5.10 Addition:
For the tests of Clause 19, the additional sample or samples shall be identical in all respects
to the test sample, charged with oil, if necessary, and vapour refrigerant. The sample has to
be provided with the motor-compressor protection system, starting relay, start capacitor,
run capacitor and control system, if any, as specified by the manufacturer, except that the
rotor shall have been locked by the manufacturer.
The manufacturer or responsible agent shall provide the following information for each type of
motor-compressor submitted for the tests:
– type (synthetic or cellulosic) of winding insulation;
– refrigerant identification:
a) for a single component refrigerant, by at least one of the following:
• chemical name;
• chemical formula;
• refrigerant number;
b) for a blended refrigerant, at least one of the following:
• chemical name and nominal proportion of each of the components;
• chemical formula and nominal proportion of each of the components;
• refrigerant number and nominal proportion of each of the components;
• refrigerant number of the refrigerant blend;
– types and quantity of oil to be used if the test samples which use oil are not already
charged;
– application category or application categories for motor-compressors classified as
being tested with Annex AA;
– whether a supply cord can be connected directly to terminals on the motor-compressor;
– for motor-compressors intended for appliances with a transcritical refrigeration
system, the test pressure for the high pressure side if higher than the minimum test
pressure.
5.11 Replacement:
For motor-compressors which can be used in appliances where the supply cord is
connected directly to terminals on the motor-compressor, the test sample shall be provided
with a supply cord.
NOTE 101 Any additional samples required for testing need not be provided with a supply cord.
5.101 Motor-compressors, including those with crank-case heaters, are tested as motor-
operated appliances.
5.102 With regard to 6.104, protective devices other than the declared device under test
shall be disabled during the tests of Annex AA and Clause 19. If multiple protective devices
are declared, each shall be tested independently.
60335-2-34 © IEC:2012 – 13 –
6 Classification
This clause of Part 1 is applicable, except as follows.
6.101 Motor-compressors not incorporating an electronic circuit are classified as being
tested with Annex AA or without Annex AA.
Motor-compressors incorporating an electronic circuit are classified as being tested with
Annex AA.
Motor-compressors using refrigerant R744 shall not be classified as being tested with
Annex AA.
Motor-compressors can be classified as being tested with Annex AA only if the motor-
compressor in combination with the motor-compressor protection system or motor-
compressor control system, if any, can be configured to operate so as to deliver maximum
cooling capacity, independently of any input sensors that are only provided as part of the final
application.
NOTE Motor-compressors classified as being tested without Annex AA and their protection system or control
system, if any, are normally subjected to a heating test as a complete system in the final application in accordance
with the appropriate appliance standard.
Compliance is checked by
– the tests of this standard including the tests in Annex AA, for motor-compressors tested
with Annex AA;
– the tests of this standard but not including the tests in Annex AA, for motor-compressors
tested without Annex AA.
6.102 Motor compressors are classified as being
– intended for direct connection of the appliance supply cord to the motor-compressor
terminals, or
– not intended for direct connection of the appliance supply cord to the motor-compressor
terminals.
NOTE 1 Motor-compressors can in both cases be delivered with or without the external components necessary
for connection of the supply cord.
NOTE 2 Motor-compressors intended for direct connection of the appliance supply cord to their terminals can
also be used without the supply cord being connected directly to their terminals.
NOTE 3 If the motor-compressor is used without the relevant components or with components different from
those specified by the manufacturer, additional testing in accordance with the appropriate appliance standard can
be necessary.
Compliance is checked by inspection and by the relevant tests.
6.103 Motor-compressors are classified as being protected by protective electronic
circuits or not being protected by protective electronic circuits.
This does not preclude the protective electronic circuits being provided in the end product,
in which case many of the tests of this standard shall be conducted on the end product.
Compliance is checked by inspection and by the relevant tests.
– 14 – 60335-2-34 © IEC:2012
6.104 The motor-compressor manufacturer shall declare the means of motor protection,
thermal motor protector, impedance protection, protective electronic circuit, or a
combination of the above.
Compliance is checked by inspection and by the relevant tests
7 Marking and instructions
This clause of Part 1 is applicable, except as follows.
7.1 Modification:
The rated power input or rated current need not be marked.
7.5 Not applicable.
7.7 Not applicable.
7.12 Not applicable, except 7.12.1 which is applicable.
7.13 Not applicable.
8 Protection against access to live parts
This clause of Part 1 is applicable.
9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is not applicable.
11 Heating
This clause of Part 1 is not applicable.
NOTE 101 For motor-compressors, this clause of Part 1 can be covered by Annex AA.
12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is not applicable, except 13.3 as required by 19.104.
14 Transient overvoltages
This clause of Part 1 is applicable.
60335-2-34 © IEC:2012 – 15 –
15 Moisture resistance
This clause of Part 1 is applicable, except as follows.
15.3 Addition:
NOTE 101 Motor-compressors with glass-insulated terminals and without any external control devices,
protectors or other components need not be tested.
16 Leakage current and electric strength
This clause of Part 1 is applicable.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable, except as follows.
19.1 Modification:
Replace the test specification by the following:
Motor-compressors are submitted to the tests of 19.14, 19.15, 19.101, 19.102, 19.103 and,
additionally, if so required by the classification of 6.101, to the tests specified in Annex AA.
Motor-compressors incorporating electronic circuits are also subjected to the tests of
19.11 and 19.12.
Only one abnormal condition is simulated each time.
Compliance with the tests of 19.11 and 19.12 is checked as described in 19.13. Compliance
with the tests of 19.101, 19.102 and 19.103 is checked as described in 19.104. Compliance
with the tests of Annex AA is checked as described in Annex AA.
19.2 to 19.10 Not applicable.
19.11.2 Addition:
For simulation of the fault conditions, a motor-compressor incorporating an electronic
circuit is connected to the substitute refrigeration circuit of Figure AA.1 and operated under
the conditions given in Clause AA.5. The condensing temperature applied being 5 K lower
than that which caused the motor-compressor protective electronic circuit to operate or
the motor-compressor to stall during the test of Clause AA.5.
– 16 – 60335-2-34 © IEC:2012
19.11.3 Replacement:
If the motor-compressor is classified as being protected by a protective electronic circuit
and if this protective electronic circuit operates to ensure compliance with Clause 19 and
Annex AA, the tests of 19.101, 19.102, 19.103 and Annex AA are repeated with a single fault
simulated, as indicated in a) to g) of 19.11.2.
However, the test of Annex AA is not repeated if during the test of Annex AA, for motor-
compressors classified as being tested with Annex AA, the motor-compressor protection
system did not operate. The test of Annex AA is also not repeated on motor-compressors
that are classified as being tested without Annex AA.
19.11.4 Addition:
If the tests have to be carried out, they shall be carried out in the end product application.
NOTE 101 The application of these tests in this part 2 is not mandatory since they are conducted in the end
product application.
19.13 Addition:
If the motor-compressor is intended to use flammable refrigerants, and if during the tests of
19.11.2 and 19.11.3 any electrical component produced sparks or arcs, this shall be reported
unless the component was an intentionally weak part or a non-self-resetting protective
device.
19.14 Replacement:
Motor-compressors are operated under the conditions of Clause AA.1. Any contactor or
relay contact that operates under the conditions of Clause AA.1 is short-circuited.
If a relay or contactor with more than one contact is used, all contacts are short-circuited at
the same time.
Any relay or contactor which operates only in order to ensure that the motor-compressor is
energized for normal use and that does not otherwise operate in normal use is not short-
circuited.
If more than one relay or contactor operates in Clause AA.1, each such relay or contactor is
short-circuited in turn.
For motor-compressors that use alternate start capacitors, the test shall be carried out using
each alternate start capacitor in turn.
The test is only performed on motor-compressors classified as being tested with Annex AA.
NOTE 1 For motor-compressors not classified as being tested with Annex AA, this test will be performed on the
final product.
NOTE 2 If the motor-compressor has several modes of operation, the tests are carried out with the motor-
compressor operating in each mode, if necessary.
19.101 The motor-compressor and motor-compressor protection system, together with
all their associated components which operate under locked-rotor conditions, are connected
in the circuit shown in Figure 101 and supplied with rated voltage as specified in 5.8.2.
NOTE 1 The associated components which comply with the requirements in Clause 24 are not evaluated by this
test.
60335-2-34 © IEC:2012 – 17 –
For motor-compressors with a non-self-resetting thermal motor-compressor protection
system, the motor-compressor is operated until a sufficient number of operations have been
made to ensure that continuous automatic recycling does not occur. The number of operations
should, however, not be less than three and should be performed as rapidly as possible with a
minimum delay of 6 s.
A longer off time is permitted if a delay feature longer than 6 s is part of the protection
system or control system.
All electromechnical components of the protection system shall be tested individually for
50 operations in total with the motor-compressor or with a load corresponding to the actual
motor-compressor or a higher load.
For motor-compressors with a self-resetting motor-compressor protection system, the
motor-compressor protection system is allowed to cycle continuously for a period of
15 days or for at least 2 000 cycles, whichever is the longer.
Motor-compressors without a motor-compressor protection system and only protected by
the impedance of the windings, are connected in the circuit shown in Figure 101 and supplied
with rated voltage. If a motor-compressor is designed for more than one rated voltage it is
tested at the highest voltage.
At the conclusion of the first 72 h of the locked-rotor test, the motor-compressor is subjected
to the electric strength test as specified in 16.3.
For motor-compressors with a self-resetting motor-compressor protection system, if
2 000 cycles of the protection system have not been performed by the end of the 15-day
period, the test may be terminated provided the following conditions are met:
– the housing temperature is recorded on the 12th and 15th days. If, during this three day
period, the temperature has not increased
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